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Polyethylene Film Properties Improvement by Reformulation

Publishing Venue

The IP.com Prior Art Database

Abstract

The article describes the effect of improving polyethylene film optical, mechanical and sealing properties by reformulating a mono co-extrusion structure into real co-extrusion structure with maintained film composition (i.e., no change to total blending ratio) and no extra cost. The conclusion was supported with different polyethylene (PE) types, various PE blending ratios, and different film thicknesses and densities. The methodology offers a new concept and principle to design film structures to maximize optical, mechanical and sealing properties without changing film composition and cost.

Country

United States

Language

English (United States)

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Polyethylene Film Properties Improvement by Reformulation

Abstract:

The article describes the effect of improving polyethylene film optical, mechanical and sealing properties by reformulating a mono co-extrusion structure into real co-extrusion structure with maintained film composition (i.e., no change to total blending ratio) and no extra cost. The conclusion was supported with different polyethylene (PE) types, various PE blending ratios, and different film thicknesses and densities. The methodology offers a new concept and principle to design film structures to maximize optical, mechanical and sealing properties without changing film composition and cost.

Background

In PE film applications, such as lamination sealant film, agriculture film and collation shrink film, mono co-extrusion structures (all co-extrusion layers are using the same blending composition and ratio) are still widely used by film converters due to their convenience. However, the film performance including optical, mechanical and sealing properties cannot be optimized. The blending in each layer actually compromises the film performance. Film converters believe that they have to increase percentage of "good materials" which means metallocene polyethylene in the film to achieve better performance in a current mono co-extrusion structure. The increased metallocene polyethylene percentage will increase the material cost.